Technical Questions

Q:

 To remove duplicate rows from the results of an SQL SELECT statement, the ________ qualifier specified must be included.

A) ONLY B) DISTINCT
C) UNIQUE D) SINGLE
 
Answer & Explanation Answer: B) DISTINCT

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Database

1 5001
Q:

How are the wait/signal operations for monitor different from those for semaphores?

Answer

If a process in a monitor signal and no task is waiting on the condition variable, the signal is lost. So this allows easier program design. Whereas in semaphores, every operation affects the value of the semaphore, so the wait and signal operations should be perfectly balanced in the program.

Report Error

View answer Workspace Report Error Discuss

1 4935
Q:

RIP- Routing Information Protocol

A) TRUE B) FALSE
Answer & Explanation Answer: A) TRUE

Explanation:

It is a simple protocol used to exchange information between the routers.

Report Error

View Answer Workspace Report Error Discuss

Subject: Networking
Job Role: Network Engineer

0 4926
Q:

Gateway-to-Gateway protocol is a protocol formerly used to exchange routing information between Internet core routers.

A) TRUE B) FALSE
Answer & Explanation Answer: A) TRUE

Explanation:

It is a protocol formerly used to exchange routing information between Internet core routers.

Report Error

View Answer Workspace Report Error Discuss

Subject: Networking
Job Role: Network Engineer

1 4923
Q:

Rewrite the following set of statements using conditional operators.

int a =1, b ;

if ( a > 10 )

b = 20; 

Answer

int a = 1, b , dummy;


a > 10 ? b = 20 : dummy =1;


 


Note that the following would not have worked:


a > 10 ? b = 20 : ;;


 

Report Error

View answer Workspace Report Error Discuss

Subject: Programming

3 4918
Q:

Data flow analysis studies

A) The use of data on paths through the code B) Possible communications bottlenecks in a program
C) The intrinsic complexity of the code D) The rate of change of data values as a program executes
 
Answer & Explanation Answer: A) The use of data on paths through the code

Explanation:

Data flow analysis studies the use of data on paths through the code.

Report Error

View Answer Report Error Discuss

4 4905
Q:

 A supertype/subtype hierarchy has which of the following features?

A) Subtypes at the lower lever in the hierarchy inherit attributes only from their immediate supertype. B) Subtypes at the higher lever in the hierarchy inherit attributes only from their immediate subtype.
C) Attributes are assigned at the highest logical level. D) Attributes are assigned at the lowest logical level.
 
Answer & Explanation Answer: C) Attributes are assigned at the highest logical level.

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Database

0 4895
Q:

 A composite attribute is which of the following?

A) An attribute that can be broken into components B) An attribute that cannot be broken into components
C) Multiple attributes D) An identifier
 
Answer & Explanation Answer: A) An attribute that can be broken into components

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Database

0 4883